JP2020137938A - Packaged absorbent article and manufacturing method of packaged absorbent article - Google Patents

Abstract

To provide a packaged absorbent article which facilitates release of a seal of a seal part in opening and prevents unintentional release of the seal before opening.SOLUTION: A packaged absorbent article includes a packaging sheet and an absorbent article packaged by the packaging sheet. The packaging sheet is sealed by folding in a manner that a first region including one end in a first direction is arranged above a second region including the other end in the first direction and forming a plurality of crimp parts in an edge part in a second direction perpendicular to the first direction. The packaging sheet can be opened by peeling off a seal in a manner to lift the first region from one end in the first direction, and the plurality of the crimp parts include a protruded crimp part protruding upward.SELECTED DRAWING: Figure 5

Description

The present invention relates to a package absorbent article and a method for producing a package absorbent article.

Absorbent articles such as sanitary napkins, panty liners, and light incontinence pads are generally provided wrapped in wrapping sheets for hygiene and for convenience of portability. For example, an elongated packaging sheet is folded with an absorbent article and the edges of the packaging sheet are joined so that the first region, including one end in the longitudinal direction, is located outside the second region, including the other end in the longitudinal direction. An absorbent article (packaged absorbent article) packaged by forming a seal portion is known (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 9-154880

The sealing portion of the packaging absorbent article as described above is formed by, for example, sandwiching the edge portion of the packaging sheet between a roller having a plurality of convex portions of a predetermined pattern and a smooth roller, and applying heat and pressure. be able to. As a result, the seal portion can be an assembly of a plurality of crimping portions corresponding to the shape of the convex portion.

When opening the packaging absorbent article, the user usually peels off the seal portion by lifting the first region of the packaging sheet arranged on the outside upward. However, since each crimping portion is a portion in which the stacked packaging sheets are stretched, deformed and joined by heat and pressure, a relatively large force is required to peel off the packaging sheet depending on the configuration of the crimping portion, and the package is opened. It may be difficult to do. On the other hand, if the conditions such as heat and pressure at the time of forming the crimping portion are weakened in consideration of the ease of opening, the seal may be unintentionally released when the user does not want to open the seal. There is.

In view of the above points, it is an object of one aspect of the present invention to provide a package absorbent article that can easily release the seal of the seal portion at the time of opening and prevent unintentional release of the seal before opening.

A first aspect of the present invention is a packaging absorbent article including a packaging sheet and an absorbent article packaged by the packaging sheet, wherein the packaging sheet has a first region including one end in a first direction. It is folded so as to be arranged above the second region including the other end of the first direction, and sealed by forming a plurality of crimping portions at the edge portion in the second direction orthogonal to the first direction. The first region can be opened by peeling off the seal by lifting the first region upward from one end in the first direction, and the plurality of crimping portions include a convex crimping portion extending upward.

According to the first aspect, when the user peels the packaging sheet from the end side of the first region at the time of opening the package absorbent article, there is a convex crimping portion, so that at least at the initial stage of peeling. The angle formed by the pulling direction of the upper packaging sheet (first region) and the extending direction of the lower packaging sheet (second region) can be made closer to 180 °, and both packaging sheets can be easily peeled off. .. Therefore, it is possible to form a seal portion that can be easily released at the time of opening without weakening the conditions for forming the crimp portion.

In the second aspect of the present invention, among the plurality of crimping portions, the crimping portion closest to one end in the first direction in the overlapping region of the first region and the second region is the convex crimping portion.

According to the second aspect, when the packaging sheet is peeled off from the end side of the first region when the package absorbent article is opened, the first region is lifted and the crimping portion to be first released from the joint is convex. It can be a crimping part. In opening, a relatively large force is usually required to peel off the packaging sheet at the first crimping portion, so that the initial operation of opening is facilitated by this embodiment.

In the third aspect of the present invention, the crimping portion further includes a concave crimping portion recessed downward.

According to the third aspect of the present invention, since the crimping portion includes the concave crimping portion, it is possible to reduce the portion of the seal portion that travels to the upper side for a long time without reducing the crimping portion. As a result, the appearance can be improved without deteriorating the sealing property of the sealing portion.

In the fourth aspect of the present invention, the convex crimping portion and the concave crimping portion are alternately arranged along the first direction, and the cross section cut along the first direction has a continuous tangential inclination. It has a curved shape that changes in a linear manner.

According to the fourth aspect, since the convex crimping portions and the concave crimping portions are alternately arranged, the raised portion and the recessed portion of the packaging sheet in the sealing portion do not stand out from each other and look good. It can be made uniform as a whole.

In the fifth aspect of the present invention, the rising angle of the convex crimping portion is 20 to 70 ° when viewed in a cross section cut along the first direction.

By setting the rising angle of the convex crimping portion to the predetermined value as in the fifth aspect, the direction in which the upper packaging sheet (first region) is pulled at least at the position where peeling starts in the convex crimping portion. , The angle formed by the surface of the lower packaging sheet (second region) can be easily brought close to 180 °. Thereby, the joining of the packaging sheet in the convex crimping portion can be more easily eliminated.

In the sixth aspect of the present invention, the packaging sheet is at least tri-folded.

According to the sixth aspect, it is possible to obtain a more compact package absorbent article in which the first region is arranged on the outer surface of the second region.

In the seventh aspect of the present invention, the packaging sheet includes a resin film.

According to the seventh aspect, since the surface of the packaging sheet is flat, the crimping portion can be bonded over the entire surface of each crimping portion, so that a crimping portion having high bonding strength can be obtained even under relatively weak crimping conditions.

An eighth aspect of the present invention is a method for producing a packaging absorbent article including a packaging sheet and an absorbent article packaged by the packaging sheet, wherein the packaging sheet includes one end in a first direction. One region is folded so as to be arranged above the second region including the other end of the first direction, and sealed by forming a plurality of crimping portions at the edge portion in the second direction orthogonal to the first direction. Including that, the plurality of crimping portions include a convex crimping portion extending upward.

According to the eighth aspect, it is possible to provide a method for producing a package-absorbent article having the same effect as that of any one of the first to seventh aspects.

According to one embodiment of the present invention, it is possible to provide a package-absorbent article that can easily release the seal of the seal portion at the time of opening and can prevent unintentional release of the seal before opening.

It is a figure which looked at the unfolded state of the package absorbable article by one form of this invention from the inner surface of a packaging sheet. It is a perspective view of the package absorbent article by one form of this invention. FIG. 2 is a cross-sectional view taken along the line II of FIG. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 2 is an enlarged plan view of a portion III of FIG. 2 and a partially enlarged sectional view thereof. It is a figure explaining the peeling of a packaging sheet in a convex crimping portion. It is a figure explaining the peeling of a packaging sheet in a concave crimping portion. It is a top view of the package absorbent article by one embodiment of this invention. It is a figure which shows the modification of the crimping part. It is a figure which shows the modification of the crimping part. It is a figure which shows the manufacturing example of a seal part. It is a figure explaining the formation example of the crimping part in a seal part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each drawing, unless otherwise specified, the same or corresponding configurations may be designated by the same reference numerals and the description thereof may be omitted. In addition, the drawings are schematic to help the understanding of the invention.

FIG. 1 shows a state in which the package absorbent article 100 according to one embodiment of the present invention is developed. FIG. 1 can be said to be a view of a state in which the absorbent article 1 is placed on the inner surface of the packaging sheet 10 before the absorbent article 1 is packaged by the packaging sheet 10. In this embodiment, a sanitary napkin will be described as an example. Further, FIG. 2 shows a perspective view of the package absorbent article 100, that is, a state after the absorbent article 1 of FIG. 1 is folded together with the packaging sheet 10. Further, FIG. 3 shows a sectional view taken along line II of FIG. 2, and FIG. 4 shows a sectional view taken along line II-II of FIG. Note that FIG. 4 omits the illustration of the crimping portion in the sealing portion.

In the examples of FIGS. 1 and 2, the packaging sheet 10 has a rectangular elongated shape. In this example, the longitudinal direction of the packaging sheet 10 is defined as the first direction D1, and the lateral direction orthogonal to the first direction D1 is defined as the second direction D2. However, the shape of the packaging sheet 10 is not limited to the elongated shape as shown in the drawing, and the length of the first direction D1 and the length of the second direction D2 may be substantially equal to each other. Further, the specific shape may be a polygon other than a quadrangle, a circle, an ellipse, or the like, depending on the shape of the absorbent article to be packaged.

The dimensions of the packaging sheet 10 also depend on the size and shape of the absorbent article 1 to be packaged. For example, when the packaging sheet 10 is unfolded (FIG. 1), the length of the first direction D1 is 120 to 500 mm, and the length of the second direction is 120 to 500 mm. The length of D2 can be 75 to 180 mm. Further, in the folded state (FIG. 2), the length of the first direction D1 may be 50 to 160 mm.

As the packaging sheet 10, a polyolefin-based film such as polypropylene or polyethylene, a single-layer or multi-layer resin film such as polyester or polyvinyl alcohol, a non-woven fabric, or a laminated non-woven fabric in which a non-woven fabric and a resin film are laminated can be used. A resin film is preferable if the design by printing is emphasized. Further, when the resin film is used, since the sheet surface is flat, it is possible to form a crimped portion uniformly fused over the entire surface even under relatively weak crimping conditions (heat and pressure conditions). On the other hand, if the texture and softness are important, a non-woven fabric or the like is preferable.

The packaging sheet 10 can wrap the absorbent article 1 by placing the absorbent article 1 on the inner surface and then folding the absorbent article 1 in a tri-fold, for example, as shown in FIG. Rolling tri-folding is a folding method in which a sheet-like body is divided into three regions in one direction, and the regions at both ends of the three regions are folded on the same side so that they are at least partially overlapped. Point to. In the example of FIG. 1, the first region R1 including one end 11 in the longitudinal direction D1 of the packaging sheet 10 is folded so as to be arranged on the second region R2 including the other end 12 in the longitudinal direction D2. More specifically, in FIG. 1, the second region R2 is valley-folded along the folding line L1 as shown by the arrow A, and then the first region R1 is valley-folded along the folding line L2 as shown by the arrow B. .. At this time, the absorbent article 1 may also be folded together with the packaging sheet 10, or after the absorbent article 1 is folded at an arbitrary destination, the second region R2 and the first region R1 may be folded in this order as described above. it can. Alternatively, the absorbent article 1 is pre-folded by another folding method or prepared without folding, and placed on the third region R3 between the first region R1 and the second region R2 of the packaging sheet 10. , The first region R1 and the second region R2 can also be overlapped.

After the packaging sheet 10 is folded together with the absorbent article 1 as described above, the end portion of the first region R1, that is, one end 11 in the longitudinal direction D1 may be fastened to the second region R2 by the tab tape 15. Yes (Fig. 2 and Fig. 3). At the time of opening, the user can open the package absorbent article 100 by holding and pulling the tab tape 15 to lift the first region R1 together with the tab tape 15 and peel it off from the second region R2.

As shown in FIG. 2, in the package absorbent article 100, both edges of the packaging sheet 10 in the lateral direction D2 are sealed, and the seal portions 20 and 20 are formed. Such sealing portions 20 and 20 can prevent the absorbent article 1 from being exposed to the outside, which is hygienic. Further, the seal portions 20 and 20 are formed so as to be openable. Here, "openable" or "openable" means that the seal is strong enough to be opened by hand without using a tool.

The seal portions 20 and 20 may be formed within a range of 25 mm from the edge of the packaging sheet 10 in the lateral direction D2. Further, the seal portions 20 and 20 can be formed within the above range with a width of 5 to 25 mm (length in the lateral direction D2). The seal portions 20 and 20 can be formed, for example, at a distance of 20 mm or less from the edge in the lateral direction D2. In this example, the seal portions 20 and 20 are formed continuously over the longitudinal direction D1 with the same width from the edge of the packaging sheet 10 in the lateral direction D2 over a predetermined position (FIG. 2). The widths of the seal portions 20 and 20 are not constant but may change over the longitudinal direction D1.

As shown in FIG. 2, the seal portions 20 and 20 are composed of a plurality of crimp portions 25. The crimping portion 25 is a portion where the packaging sheets are joined to each other by applying pressure and heat from one side or both sides of the plurality of stacked packaging sheets. The crimping portion may be formed by partially pressurizing and heating the packaging sheet to exert the influence of pressure and heat, or by affecting the heat generated by the pressurization on the packaging sheet together with the pressure. You may. The crimping portion is preferably formed by a heat seal, an ultrasonic seal, or the like, but may be formed by another sealing means.

As shown in FIGS. 2 and 4, two or three packaging sheets 10 are stacked on the sealing portions 20 and 20 formed at the edge portion of the packaging absorbent article 100 in the second direction D2. When the wrapping sheet 10 is folded in four or more, a portion in which four or more of the wrapping sheets 10 are stacked is formed. A plurality of crimping portions 25 (described later with reference to FIG. 5A and the like) are formed on the sealing portion 20 over the entire thickness direction of the stacked packaging sheets 10.

The method of wrapping the absorbent article 1 with the packaging sheet 10 does not necessarily have to be by folding in three. The packaging sheet 10 may be folded in four or five, for example, if the area including one end of the first direction D1 can be arranged on the area including the other end of the first direction D1. The above may be applied. In that case, the end side of the second region R2 can be folded in advance before the first region R1 is overlapped. When the packaging sheet 10 is folded in four or more, the seal portions 20 and 20 have a portion in which four or more packaging sheets 10 are stacked, unlike the example of FIG.

FIG. 5A shows an enlarged view of Part III of FIG. FIG. 5A is a plan view of the seal portion 20 composed of an aggregate of the crimping portions 25, 25, .... In the example shown in FIG. 5A, each crimping portion 25, that is, a portion where the plurality of stacked packaging sheets 10 are joined by crimping, has a circular plan view shape. However, the plan-view shape of each crimping portion 25 is not limited to the one shown in the drawing, and may be elliptical, polygonal (including triangular, quadrangle other than square, etc.), heart-shaped, drop-shaped, star-shaped, or these shapes. The shape may be a part or a combination of these shapes. Further, in the illustrated example, the plurality of crimping portions 25, 25, ... Are arranged in a grid pattern at predetermined intervals, but the arrangement of the crimping portions 25, 25, ... Is not particularly limited, for example, staggered. It can also be arranged in a shape.

FIG. 5B shows a cross-sectional view of one crimping portion 25 (a part of the IV-IV line cross section of FIG. 5A). The crimping portion is a joint portion that is fused and integrated under the influence of heat and pressure. It can also be stretched and have a thickness smaller than the thickness of other parts. Such a crimping portion is, for example, a packaging sheet to be sealed between a pair of rolls having a protrusion corresponding to the shape of the crimping portion on the surface and an opposing roll having a recess corresponding to the protruding portion on the surface. It can be formed by supplying a portion of. As shown in the figure, the crimping portion 25 is formed by being stretched at least partially until the height (or depth) is different from that of the surrounding region, so that it is more difficult to peel off than the flat crimping portion. There is.

FIG. 5B shows a crimping portion 25A that travels upward, that is, is convex toward the surface of the package absorbent article. In the crimping portion 25A shown in FIG. 5B, the third region R3, the second region R2, and the first region R1 that are stacked in this order are all slightly stretched upward to form a crimped portion. There is. In the present specification, unless otherwise specified, "upper" or "upper" means that the first region R1 is arranged in the thickness direction of the state in which the absorbent article 1 is wrapped in the packaging sheet (FIG. 2). The term "upper" refers to the direction from the second region R2 or the third region R3 side to the first region R1 side. Further, "lower", "lower side", and "lower side" refer to positions and directions opposite to the above-mentioned positions and directions, respectively.

In such a crimping portion 25A (25), for example, the packaging sheets are separated from each other by the force when one packaging sheet is pulled upward in the opening operation, and the bonding is released. Hereinafter, the change in the state of the crimping portion 25 at the time of opening will be described.

6 (a) to 6 (c) show changes in the state of the convex crimping portion 25A at the time of opening. In this figure, the third region R3 is not shown for the sake of simplicity. FIG. 6A shows a state in which the convex crimping portion 25A before opening is maintained in a state where the first region R1 and the second region R2 of the packaging sheet 10 are joined to each other, and FIGS. 6B and 6C show. ) Indicates the process in which the first region R1 is rolled up and pulled off.

At the time of opening, the user usually holds one end of the first direction D1 of the package absorbent article, the portion where the second region R2 is exposed, with one hand so as to sandwich the exposed portion together with the third region R3 from above and below, and the other. The tab tape 15 is peeled off by hand, and the first region R1 is peeled off together with the tab tape 15 (FIG. 2).

Generally, when two sheets laminated and joined are peeled off from each other, it is easy to peel off by pulling one sheet and the other sheet in opposite directions. More specifically, if the direction in which one sheet is pulled is close to 180 ° with respect to the extending direction of the surface of the other sheet to be left, it is easy to separate the joints of both sheets. .. Here, when the cross section of the convex crimping portion 25A in the state where the first region R1 and the second region R2 are being separated is microscopically viewed (FIGS. 6A and 6B), both sheets are peeled off. At the position where the first region R1 of the packaging sheet is pulled, the direction D3a can form an angle close to 180 ° with respect to the extending direction (indicated by the dotted line) of the remaining second region R2. At this time, the stress tends to be concentrated on the tip when viewed in the peeling direction. In other words, the portion where the connection between the first region R1 and the second region R2 is released becomes linear (dotted in the cross-sectional view of FIG. 6), and is viewed from the tip side in the peeling direction. It can be moved to the rear end side.

As described above, in the convex crimping portion 25A, the force required to release the joint between the first region R1 and the second region R2 can be relatively small, particularly at the stage of starting peeling. Therefore, since the seal portion 20 includes the convex crimping portion 25A, it is possible to easily release the seal of the seal portion 20.

Further, since the force required for peeling the packaging sheets from each other in the convex crimping portion 25A can be suppressed, the sound that may be generated at the time of peeling can be reduced. Conventionally, when the package absorbent article is opened, a relatively loud noise is generated when the seal part is peeled off. Therefore, when exchanging the absorbent article in the toilet, the user who feels stress by paying attention to the outside of the private room of the toilet. However, according to this embodiment, the stress of such a user can be reduced.

For comparison, FIGS. 7 (a) to 7 (c) show changes in the state of the concave crimping portion 25B recessed downward at the time of opening. Similar to FIGS. 6 (a) to 6 (c), FIG. 7 (a) shows a state in which the first region R1 and the second region R2 of the packaging sheet 10 of the pressing attachment portion 25B before opening are maintained. 7 (b) and 7 (c) show the process in which the first region R1 is rolled up and pulled off.

As shown in FIGS. 7 (a) and 7 (b), the direction D3b in which the first region R1 of the packaging sheet 10 is pulled at the position where both sheets are peeled off is the remaining second. The area R2 is slanted with respect to the extending direction (shown by the dotted line), but has an angle close to vertical. At this time, the stress is less likely to be concentrated on the tip and easily dispersed on the joint surface. That is, the portion where the connection between the first region R1 and the second region R2 is released tends to be planar (linear in the cross-sectional view of FIG. 7) instead of linear. Therefore, the force required to release the joint is relatively large. Therefore, in the concave crimping portion 25B, the first region R1 and the second region R2 are more difficult to peel off than the convex crimping portion 25A described above.

As described above, the concave crimping portion 25B is relatively difficult to peel off, but it does not protrude when viewed from the surface side (the surface side shown in FIG. 2) of the package absorbent article 100, so that the surface looks good. Then it may be preferred. Therefore, when the appearance of the seal portions 20 and 20 is emphasized, for example, when a pattern or characters are printed on the seal portions 20 and 20 and the appearance is not desired to be disturbed as much as possible, the concave crimp portions are formed on the plurality of crimp portions 25. By including 25B, the appearance can be improved.

In consideration of appearance, it is conceivable to simply reduce the number of convex crimping portions 25A in the sealing portion provided with only the convex crimping portion 25A, but the sealing properties of the sealing portions 20 and 20 are weakened, which is not desired by the user. There is also a concern that it will be opened at the timing. On the other hand, by adjusting the sealing property by combining the convex crimping portion 25A and the concave crimping portion 25B, it is possible to form the sealing portions 20 and 20 having good appearance while ensuring the sealing property by the original crimping portion. it can.

As described above, the seal portion 20 can be easily unsealed at the position where the convex crimping portion 25A is located. Therefore, when a plurality of crimping portions are provided, if the crimping portion to be peeled off first is the convex crimping portion, the packaging absorbent article The ease of opening is improved. That is, in the overlapping region _ROL (FIG. 2) where the first region R1 and the second region R2 of the packaging sheet 10 overlap, one or a plurality of crimps closest to one end 11 of the first direction D1 of the packaging sheet 10. It is preferable that the portion 25 is a convex crimping portion 25A. This facilitates the smooth initial operation of opening. If the initial operation is smooth, the operation gains momentum, so that the subsequent operation can be easily continued.

Further, when the package absorbent article 100 is viewed from above, the direction in which the first region R1 of the packaging sheet 10 is peeled off at the time of opening is the first direction D1, but the user can use the tab tape arranged in the center of the second direction D2. Since the seals 20 and 20 are actually peeled off by holding the 15th, the direction in which the seal portions 20 and 20 are actually peeled off is an oblique direction (shown in FIG. 8). Therefore, by making the crimping portion 25 arranged on the innermost side of the second direction D2 the convex crimping portion 25A, the first region R1 can be easily peeled off, and the initial operation can be performed more smoothly.

Further, by increasing the ratio of the convex crimping portions 25A in the regions Z and Z extending in the diagonal direction with respect to the first direction D1 in the sealing portions 20 and 20, preferably all of the crimping portions 25 in the regions Z and Z. By setting the convex crimping portion 25A, it is possible to easily release the seals of the sealing portions 20 and 20.

FIG. 9 shows a modified example of the crimping portion 25 in this embodiment. FIG. 9 shows a cross section of the crimping portion 25 as in FIGS. 6 (a) and 7 (a). In the example shown in FIG. 9, the convex crimping portion 25A and the concave crimping portion 25B are continuously formed, and the height or depth of each crimping portion 25 is lower than that in the examples shown in FIGS. 6 and 7. Or it is shallow.

Further, when viewed from the convex crimping portion 25A in FIG. 9, the start of the convex portion is gentle, that is, the rising angle α of the convex crimping portion 25A is relatively small. According to this example, at the end position of the convex crimping portion 25A at the start of peeling, the angle of the direction D3a in which the first region R1 is pulled with respect to the extending direction of the second region R2 left after being peeled is set to 180 °. It will be easier to get closer. Thus, for example, a convex crimp portion 25A as shown in FIG. 9, in the overlap region R _OL, when placed closest to the end 11 of the package sheet 10, the effect of facilitating the opening is particularly exhibited. The rising angle α of the convex crimping portion 25A is preferably 20 to 70 °.

Further, FIG. 10 shows another modification of the crimping portion 25 in the present embodiment. FIG. 10 shows a cross section of the crimping portion 25 as in FIGS. 6 (a) and 7 (a). In the example shown in FIG. 10, the convex crimping portion 25A and the concave crimping portion 25B are continuously formed as in FIG. In the example shown in FIG. 10, further, the convex crimping portion 25A and the concave crimping portion 25B may be arranged alternately and continuously along at least the first direction D1 (FIG. 2, etc.) of the packaging sheet 10. As a result, in the seal portions 20 and 20 (FIG. 2, etc.), the raised or recessed portion of the packaging sheet 10 is not biased, so that the raised or recessed portion becomes inconspicuous and the appearance of the sealed portions 20 and 20 as a whole is improved. can do. Further, the convex crimping portion 25A and the concave crimping portion 25B can be alternately arranged in the second direction D2.

Further, in the example shown in FIG. 10, the transition portion between the convex crimping portion 25A and the concave crimping portion 25B is formed in a curved shape. In other words, it has a cross-sectional shape in which the tangent line on the surface of the packaging sheet 10 changes continuously. As a result, the packaging sheets can be easily peeled off from each other at the transition portion between the convex crimping portion 25A and the concave crimping portion 25B, so that the opening operation can be made smoother.

The crimping portion 25 may have a notch formed in a part of the crimping portion depending on the crimping conditions. Further, if the notch is a continuous ring shape, the area surrounded by the notch may be removed and a through portion (hole) may be formed. When the crimping portion 25 is the convex crimping portion 25A, the packaging sheet piece in the enclosed area may be left above the packaging absorbent article. In that case, especially when a pattern or character is printed on the seal portions 20 or 20, the aesthetic appearance of the pattern or character on the seal portion 20 or 20 may be impaired. In such a case, by partially including the crimping portion other than the convex crimping portion 25A in the sealing portions 20 and 20, the appearance of the sealing portion 20 and the appearance of the entire package absorbent article 100 can be enhanced. .. Here, the crimping portion other than the convex crimping portion 25A becomes a concave crimping portion 25B or a flat crimping portion having no unevenness, but in the concave crimping portion 25B, a notch is generated at the lower tip of the crimping portion, which impairs aesthetics. Hard to get rid of.

FIG. 11 shows an example of forming a seal portion of a package absorbent article according to this embodiment. FIG. 11 shows a seal portion on the widthwise edge of the packaging sheet at the stage after the absorbent article is placed on the continuous packaging sheet and folded in three in the manufacturing stage of the packaging absorbent article. Indicates the process in which is formed. As shown in FIG. 10, the seal portion can be formed by applying heat and pressure by a pair of rolls 51 and 52 having a convex portion. A plurality of seal forming portions 51a, 51a, ..., And 52a, 52a, ... Are formed on the surfaces of the roll 51 and the roll 52.

Further, unevenness for forming a crimping portion is formed on the surfaces of the seal forming portions 51a, 51a, ... Of each of the rolls 51 and the seal forming portions 52a, 52a, ... Of the roll 52, respectively. The unevenness is configured to correspond to the desired shape of the crimping portion.

FIG. 12A shows a partially enlarged view of a configuration example of the surface of the seal forming portion 51a of the roll 51 and the surface of the seal forming portion 52a of the roll 52. As shown in FIG. 12A, the upper seal forming portion 51a in the drawing is provided with a protruding surface 511 and a recessed surface 512, and the lower seal forming portion 52a is also provided with a protruding surface 521 and a recess. A surface 522 is provided. The upper recessed surface 512 and the lower protruding surface 521 have shapes corresponding to each other. By sandwiching and crimping two or more packaging sheets between the two, as shown in FIG. 12B, the overlapping packaging sheets 10 and 10 (in the illustrated example, the first region R1 and the second). The region R2) can be joined by heat fusion and deformed so as to project upward or downward from the extending direction of the packaging sheet to form the convex crimping portion 25A and the concave crimping portion 25B.

The absorbent article 1 packaged by the packaging sheet 10 according to this embodiment is a sanitary napkin, a panty liner (pantyliner sheet), a light incontinence pad, or the like. The specific configuration includes a liquid-impermeable back sheet, a liquid-permeable front sheet, and a main body having an absorber provided between both sheets (absorbable article main body). It may be. As for the absorbent article 1, similarly to the packaging sheet 10, the first direction (longitudinal direction of the packaging sheet 10) D1 in FIG. 1 is the longitudinal direction, and the second direction (short direction of the packaging sheet 10) D2 is the lateral direction. It may have an elongated shape.

As the back sheet of the absorbent article 1, a sheet material having at least water impermeability such as an olefin resin sheet such as polyethylene or polypropylene can be used. Further, a laminated non-woven fabric in which a non-woven fabric is laminated on a polyethylene sheet or the like, or a laminated sheet of a non-woven fabric in which a waterproof film is interposed to ensure substantially impermeable property can be used. Further, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability.

The surface sheet is a liquid-permeable sheet that rapidly permeates body fluids such as menstrual blood, vaginal discharge, and urine. As the surface sheet, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like is preferably used. As the material fibers constituting the non-woven fabric, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton can be used alone or. Two or more types can be used in combination. It is also possible to use a composite fiber in which synthetic fibers having different melting points are combined.

The absorber interposed between the back surface sheet and the front surface sheet is not limited as long as it is a material capable of absorbing and retaining body fluid, but preferably contains cotton-like pulp and a water-absorbing polymer. As the water-absorbent polymer, a superabsorbent polymer (SAP), a superabsorbent polymer fiber (SAF), or a combination thereof can be used. Examples of the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. As a raw material for chemical pulp, hardwood, softwood and the like are used, but softwood is preferably used because of its long fiber length and the like. In addition, synthetic fibers may be mixed with the absorber.

The thickness of the absorbent article 1 can be in the range of 1 to 20 mm, preferably in the range of 2 to 10 mm. This thickness does not have to be uniform over the entire surface of the absorbent article 1, and by changing the thickness of the absorber, the central portion in the longitudinal direction D1 and the portion corresponding to the groove in the buttocks are bulged. You can also.

In the present specification, the embodiment has been described based on an example in which the absorbent article is a sanitary napkin, but the absorbent article packaged in the present embodiment is an individually packaged absorbent article, for example, a vaginal discharge. It can be a sheet (panty liner), a pad for light incontinence, a pad-type diaper, etc.

1 Absorbent article 10 Packaging sheet 11 Longitudinal end 12 Longitudinal end 15 Tab tape 20 Sealing part 25 Crimping part 25A Convex crimping part 25B Concave crimping part 51, 52 Pressurized rolls 51a, 52a Seal forming part 511, 521 Protruding surface 512 522 Recessed surface 100 Packaging absorbent article D1 Longitudinal direction D2 Short side direction (width direction)
D3a, D3b Direction in which the first region R1 is pulled L1 First fold line L2 Second fold line R1 First region R2 Second region R3 Third region _ROL Overlapping region

Claims (8)

A packaging absorbent article including a packaging sheet and an absorbent article packaged by the packaging sheet.
The packaging sheet is folded so that the first region including one end in the first direction is arranged above the second region including the other end in the first direction, and the packaging sheet is in the second direction orthogonal to the first direction. Sealed by forming multiple crimps on the edges
The seal can be opened by peeling off the seal by lifting the first region upward from one end in the first direction.
The plurality of crimping portions are packaging absorbent articles including a convex crimping portion that travels upward. The packaging absorbency according to claim 1, wherein among the plurality of crimping portions, the crimping portion closest to one end in the first direction in the overlapping region of the first region and the second region is the convex crimping portion. Goods. The package absorbent article according to claim 1 or 2, wherein the crimping portion further includes a concave crimping portion that is recessed downward. The convex crimping portions and the concave crimping portions are alternately arranged along the first direction.
The package-absorbent article according to claim 3, wherein the cross section cut along the first direction has a curved shape in which the slope of the tangent line changes continuously. The package absorbent article according to any one of claims 1 to 4, wherein the rising angle of the convex crimping portion is 20 to 70 ° when viewed in a cross section cut along the first direction. The packaging absorbent article according to any one of claims 1 to 5, wherein the packaging sheet is at least tri-folded. The packaging absorbent article according to any one of claims 1 to 6, wherein the packaging sheet contains a resin film. A method for producing a packaging absorbent article including a packaging sheet and an absorbent article packaged by the packaging sheet.
The packaging sheet is folded so that the first region including one end in the first direction is arranged above the second region including the other end in the first direction.
Including sealing by forming a plurality of crimping portions on the edge portion in the second direction orthogonal to the first direction.
The manufacturing method, wherein the plurality of crimping portions include a convex crimping portion that travels upward.

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